Researchers Plan Additional Diving Missions to Confirm Finding

More than 500 years after Christopher Columbus's flagship, the Santa Maria, sank in the Caribbean, a team of underwater investigators believes it has located the vessel's remains off the northern coast of Haiti—a discovery that, if proved, would be one of the most significant maritime archaeological finds.

"I'm very, very confident that we've found the site," said Barry Clifford, a noted maritime archaeologist and leader of...